Week 12 Tues Quiz
Quiz by Kari Stone
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- Q1
Determine the pH of a 0.227 M C5H5N solution at 25°C. The Kb of C5H5N is 1.7 × 10-9.
Users enter free textType an Answer300s - Q2
Which one of the following will form an acidic solution in water?
KNO3
NH4Cl
NaF
LiI
300s - Q3
Determine the Kb for CN⁻ at 25°C. The Ka for HCN is 4.9E-10.
Users enter free textType an Answer300s - Q4
In a triprotic acid, which Ka has the highest value?
Ka3
Ka1
Ka2
Kb
300s - Q5
Determine the pH of a 0.18 M H2CO3 solution. Carbonic acid is a diprotic acid whose
Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.
Users enter free textType an Answer300s - Q6
Which of the following solutions is a good buffer system?
A solution that is 0.10 M NaOH and 0.10 M HNO3
A solution that is 0.10 M HNO3 and 0.10 M KNO3
A solution that is 0.10 M NaCl and 0.10 M HCl
A solution that is 0.10 M HCN and 0.10 M LiCN
300s - Q7
If the pKa of HCHO2 is 3.74 and the pH of an HCHO2/NaCHO2 solution is 3.89, which of the following is TRUE?
[HCHO2] < [NaCHO2]
[HCHO2] = [NaCHO2]
[HCHO2] > [NaCHO2]
[HCHO2] >> [NaCHO2]
300s - Q8
A 100.0 mL sample of 0.20 M HF is titrated with 0.10 M KOH. Determine the pH of the solution after the addition of 100.0 mL of KOH. The Ka of HF is 3.5 × 10-4.
Users enter free textType an Answer300s